Proof

@mattermost/rnutils

native-seam only: the published wrapper runs unchanged over an RNUtils TurboModule that answers window geometry for real and reports a clean unmanaged state elsewhere
45%
API coverage
No visual proof cases have been published for this package yet. The registry summary below describes what the compat layer implements.
Working
getWindowDimensions from the live tenant window and its dimension events, getConstants, the addListener/removeListeners bookkeeping, isRunningInSplitView (false/false), the orientation lock calls, getHasRegisteredLoad/setHasRegisteredLoad, and getRealFilePath/saveFile echoing the path back
Missing
app-group shared directories and database paths are empty strings, so shared-container reads find nothing; deleteDatabaseDirectory, renameDatabase, deleteEntitiesFile, createZipFile, the delivered-notification queries and removals, keyboard resize modes, and setNavigationBarColor are accepted and do nothing